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July
2005 |
Laser-based Casting Speed and Slab Length Measurement
Mohammad B. Assar (left),
product metallurgist — quality systems, M.F. Battaglia
(second from left), automation engineer — No. 1 steel
producing department, and A.C. Piotrowski (second from right),
senior maintenance technician — electrical, Mittal Steel
USA – Cleveland, Cleveland, Ohio (massar@intlsteel.com);
and Francois Reizine (right), president, American Sensors Corp.,
Pittsburgh, Pa. (fr@americansensors.com)
A laser-based,
accurate slab length and casting speed measurement system
was developed and tested on Mittal Steel Cleveland’s
No. 1 caster for two months. This article describes the significant
improvement in measurement that was observed.
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Design
and Process Improvements to Increase Performance and Maintenance
Efficiencies on Continuous Caster Equipment
Jeffrey K. Brower (left),
general manager of technology and quality assurance, and Joseph
Didwall (center), vice president, Voest-Alpine Services &
Technologies, Pittsburgh, Pa. (jeff.brower@vastcorp.com, joseph.didwall@vastcorp.com);
and Kurt Engel (right), head of design management continuous
casting, Voest-Alpine Industrieanlagenbau, Linz, Austria
With
a primary focus on production, steel producers often depend
on outside vendors for the reconditioning of continuous caster
machinery. VAST’s experience in this area has led them
to recommend engineering changes and maintenance procedures
that can result in both cost and performance benefits. |
The
Castrip® Process — Direct Casting of Steel Sheet at
Nucor Crawfordsville
Peter Campbell
(left), director of marketing, Wal Blejde (second from left),
director of technology, Rama Mahapatra (center), principal metallurgist,
and Richard Wechsler (second from right), president, Castrip
LLC, Charlotte, N.C. (pcampbell@castrip.com); and Gerry Gillen
(right), Castrip manager, Nucor Steel–Indiana, Crawfordsville,
Ind. (ggillen@ns-ind.com)
Nucor
Steel is in the process of constructing a second plant based
on Castrip technology. The development of this breakthrough
technology is discussed, along with an update on recent casting
results and trends at Nucor’s Crawfordsville, Ind., plant
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Mold
Simulator: A Tool to Study Initial Solidification
Thinium T. Natarajan,
senior research engineer, Thomas J. Piccone (left), senior
research engineer, Kenneth D. Powers (second from left), project
analyst, and Christopher C. Snyder (second from right), senior
technician, U. S. Steel Corp. Research and Technology Center,
Monroeville, Pa. (ttnatarajan@uss.com, tjpiccone@uss.com,
kdpowers@uss.com, ccsnyder@uss.com); Adam B. Badri and Alan
Cramb (right), Department of Metallurgical and Materials Engineering,
Carnegie Mellon University, Pittsburgh, Pa. (cramb@cmu.edu)
A
mold simulator was constructed to investigate the heat transfer
phenomena during initial solidification in a continuous casting
mold. The influences of mold flux, mold copper coating, water
flow and mold oscillation on heat transfer interactions during
the continuous casting of steel are described. |
Improvements
in Continuous Casting Mold Technology — The First Fully
Ceramic- coated Molds
Kevin Goode (left),
manager international contracts, David Preshaw (center), engineering
manager, and Brian Stalker (right), overseas sales manager,
Corus Process Engineering, Workington, U.K.; Charles Bradley-Smith
and Kevin Davis, Outokumpu Stainless (Sheffield), U.K.; Peter
Watson, Corus RD&T, Teesside, U.K.; John Wood, Corus Teesside
Cast Products, U.K.; and Bryan Allcock, Monitor Coatings Ltd.,
U.K.
This
article describes ceramic coatings technology and its historical
use on continuous caster copper molds. Recent broadface ceramic
coating trials are fully described. |
Developments
in Electric Arc Furnace Steelmaking
Gordon
A. Irons, Steel Research Centre, McMaster University, Hamilton,
Ont., Canada (ironsga@mcmaster.ca)
There have been tremendous developments in EAF steelmaking
that have gone hand-in-hand with this process, capturing more
than 40 percent of steelmaking production. As a result, furnaces
are very complex, utilizing oxy-fuel burners, lances and carbon
injection, along with electrical power from the electrodes.
However, we have only limited understanding of the flow of
the solids, liquids and gases, and the associated transfers
of heat and mass in the furnace. Recent progress in this area
will be reviewed, and some projections on where this may take
us will be made. |
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